DESCRIBE broken after website move

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As a consequence of the move from http://clisp.sourceforge.net/
to https://clisp.sourceforge.io/ the function DESCRIBE is now broken:

[1]> (describe nil)

NIL is the empty list, the symbol NIL, lies in #<PACKAGE COMMON-LISP>, is accessible in 11 packages CLOS, COMMON-LISP, COMMON-LISP-USER, EXPORTING, EXT,
FFI, POSIX, READLINE, REGEXP, SCREEN, SYSTEM, a constant, value: NIL, names a type, names a built-in foreign type, has 2 properties SYSTEM::INSTRUCTION,
SYSTEM::TYPE-SYMBOL
;; connecting to "http://www.ai.mit.edu/projects/iiip/doc/CommonLISP/HyperSpec/Data/Map_Sym.txt"...connected...HTTP/1.1 404 Not Found
;; "Date: Tue, 22 Aug 2017 00:39:06 GMT"
;; "Server: Apache/2.4.7 (Ubuntu)"
;; "Content-Length: 253"
;; "Connection: close"
;; "Content-Type: text/html; charset=iso-8859-1"
;; ""
;; "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">"
;; "<html><head>"
;; "<title>404 Not Found</title>"
;; "</head><body>"
;; "<h1>Not Found</h1>"
;; "<p>The requested URL /projects/iiip/doc/CommonLISP/HyperSpec/Data/Map_Sym.txt was not found on this server.</p>"
;; "</body></html>"
;; connecting to "http://www.ai.mit.edu/projects/iiip/doc/CommonLISP/HyperSpec/Data/Symbol-Table.text"...connected...HTTP/1.1 200 OK...45,322 bytes
;; SYSTEM::GET-CLHS-MAP(#<IO INPUT-BUFFERED SOCKET-STREAM CHARACTER www.ai.mit.edu:80>)...978/978 symbols
.
ANSI-CL Documentation is at
"http://www.ai.mit.edu/projects/iiip/doc/CommonLISP/HyperSpec/Body/any_nil.html"
;; connecting to "http://clisp.org/impnotes/id-href.map"...connected...HTTP/1.1 301 Moved Permanently --> "https://clisp.sourceforge.io/impnotes/id-href.map"
;; connecting to "http://clisp.orghttps://clisp.sourceforge.io/impnotes/id-href.map"...
*** - PARSE-INTEGER: substring "" does not have integer syntax at position 0
The following restarts are available:
ABORT          :R1      Abort main loop

It looks like an invalid URL
"http://clisp.orghttps://clisp.sourceforge.io/impnotes/id-href.map" was constructed
(maybe in clhs.lisp?).

Bruno